JPH10166321A - Composite synthetic lumber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To form composite synthetic lumber consisting of an incombustible synthetic resin composite material integral with lumber having a smooth surface, low water absorption, densed physical strength and, besides, having a safety against decay and noxious insects. SOLUTION: The composite synthetic lumber is formed by laminating or coating a part or entire circumference of lumber surface with an incombustible synthetic resin composite material 2 with a resol type phenyl resin and a curing agent added to ceramic minute hollow particles, silica powders and glass powders and/or glass micro balloons having a comprise strength of 600kgf/cm<2> or more, a bulk specific gravity of 0.3-0.5/cm<3> , and a melting point of 1,500 deg.C or higher.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite synthetic wood obtained by laminating or coating a non-combustible synthetic resin composite material which is lightweight and has excellent heat insulating properties, and is used for exterior products, verandas, solariums, window frames, doors and construction. It can be used for wall materials, roof materials, floor materials, etc.

[0002]

2. Description of the Related Art Wood has long been used as a building material in various parts. Although it is easy to process and lightweight, it has relatively high strength, and the unique texture of natural wood has been especially valued in Japan. Although it is a promising material that does not deplete in terms of resources, it also has the disadvantages of being flammable, rotting, and going crazy.

Although wood has many advantages, it has the above-mentioned drawbacks, so that the material must be selected according to the construction site and application to be used. Since flammability is a major drawback of wood, it cannot be used in places where the use of non-combustible materials is required. Wood rot and insect damage can be prevented to some extent by preserving them sufficiently, but this is not sufficient. The wood shrinks when it dries, causing mess, which is partially overcome by using well dried wood.

[0004]

SUMMARY OF THE INVENTION The present invention makes it possible to easily solve the above-mentioned drawbacks of wood, that is, its flammability and susceptibility to decay and insect damage, while taking advantage of wood. It is intended to provide synthetic wood.

[0005]

SUMMARY OF THE INVENTION The present invention is achieved by laminating or coating a non-combustible synthetic resin composite on part or all of the surface of wood. That is, the noncombustible synthetic resin composite material according to the present invention has a compressive strength of 600 kgf / cm ^2.
The bulk specific gravity is 0.3 to 0.5 g / cm ³ and the melting point is 1500.
℃ or more ceramic fine hollow particles, blended silica powder and glass powder or / or glass micro balloon,
A resol-type phenol resin, a curing agent and water are added to the mixture, mixed well, kneaded, and molded and cured.

[0006]

The composite synthetic wood according to the present invention is flammable, which is a drawback of wood, and can be expected to have a sufficient effect on decay and insect damage. Laminated or coated with non-combustible synthetic resin composite material on wood Is what you do. In this case, a method in which the non-combustible synthetic resin composite composition is formed into a plate or various shapes in advance in a plate shape or a variety of shapes is attached to wood and laminated or covered, and the non-combustible synthetic resin composite composition is laminated or covered on wood. After that, there is a method of integrally molding and curing.

The incombustible synthetic resin composite composition uses a resol-type phenol resin as a binder. However, if the amount of the phenol resin is large, the composition does not become incombustible. For this reason, a resol-type phenolic resin is used for a composition in which 10 to 100 parts by weight of silica powder and 10 to 100 parts by weight of glass powder or glass microballoon are blended with respect to 100 parts by weight of ceramic fine hollow particles. To 6% by weight or less in terms of solids, and a curing agent and water are added to the mixture to be molded.

[0008] In the non-combustible synthetic resin composite material, since the amount of the resol-type phenol resin as a binder is 6% or less, combustible wood can be protected by laminating or coating it on wood. It has a sufficient effect on wood that is vulnerable to rot and insect damage. These differ in the place where the wood is laminated or covered depending on the use site. For example, veranda floors are particularly vulnerable to decay. However, because it is necessary to express the unique texture of wood, the surface of the floor material is made of wood, and the non-combustible synthetic resin composite composition is molded into a plate material etc. Or the non-combustible synthetic resin composite composition is laminated to wood and then integrally molded and cured.

The resole type phenolic resin used in the noncombustible synthetic resin composite material composition of the present invention includes phenols such as phenol, cresol, xylenol, paraalkylphenol, paraphenylphenol, resorcin and modified products thereof, and formaldehyde and paraformaldehyde. , Furfural, acetaldehyde and the like are produced by reacting with aldehydes such as sodium hydroxide, potassium hydroxide, calcium hydroxide, hexamethylenetetramine, trimethylamine and triethylamine.

The hollow ceramic fine particles used in the present invention have a particularly high compressive strength as compared with conventional fine hollow foams, and are resistant to high stress and shear force generated in the process of producing noncombustible synthetic resin composite materials. Can withstand. Further, by performing pressure molding, it is possible to obtain a dense noncombustible synthetic resin composite despite its light weight.

The compressive strength of the ceramic fine hollow particles or fine hollow foam is synonymous with the water pressure resistance. The measurement of the compressive strength is based on the fact that the fine hollow foam is pressurized in water and the pressure applied to the water is fine hollow. The pressure transmitted to the foam and broken by the fine hollow foam is defined as the compressive strength.

A non-combustible synthetic resin composite material capable of exhibiting excellent performance must have a sufficient stirring and kneading step, and is particularly important for a high-quality non-combustible synthetic resin composite material with a uniform product. . When sufficient stirring and kneading is performed on the composition as in the present invention, the stress and shearing force applied to the ceramic fine hollow particles are about 400 kgf / cm ^2. Since none of them could withstand such high pressure, none of them could be used as such a noncombustible synthetic resin composite material to obtain sufficient performance. That is, most of them are destroyed.

[0013] Next, when ceramic fine hollow particles are used in a non-combustible synthetic resin composite, an important factor is thermal conductivity. Fine hollow foams generally have a particle size of 0.1
(Kcal / mhr ° C.), and when half of the filled fine hollow foam is broken, the thermal conductivity drops to about 0.2 (kcal / mhr ° C.). Excellent effects can only be obtained if a completely fine hollow foam which is not destroyed is used. The ceramic fine hollow particles used in the present invention have significantly higher compressive strength than conventional fine hollow foams such as shirasu balloon, glass micro balloon, silica balloon, fly ash balloon, etc. The fine hollow particles of the composite material remain 100% perfectly spherical and therefore have heat resistance and noncombustibility. Conventional micro hollow foam has a compressive strength of 80
３００300 kgf / cm ² .

The melting point of the ceramic fine hollow particles used in the present invention is 1500 ° C. or more. Naturally, the fine ceramic hollow particles are caused by their material, but generally, the higher the melting point, the higher the compressive strength. Compressive strength 600k
If gf / cm ² or more, the melting point will be 1500 ° C. or more.

As described above, the ceramic fine hollow particles used in the present invention are 50 to 60% of silica and 40% of alumina.
, A foamed ceramic composition consisting of 1.5% to 2.5% and a compression strength of 700 kgf / cm ² , a melting point of 1600 ° C., and a bulk density of 0.3 to 0.3%. 5 g / cm ³ , thermal conductivity 0.1 (kcal
/ Mhr ° C) and consists only of completely hollow particles.
The particle diameter of the ceramic fine hollow particles is in the range of 5 to 350 μm, and is fine 5 to 75 μm, medium 75 to 15 μm.
It is mixed and used by adjusting the particle size to 0 μm and coarse 150-350 μm. The bulk specific gravity is heavy for fine particles and light for rough ones. For this reason, the range of the bulk specific gravity is 0.3-0.
It becomes 5 g / cm ³ .

The silica powder used in the present invention is an amorphous silica compound containing at least 80% of silicon oxide, for example, silica fume, silica powder, silica sand, calcium silicate, calcium metasilicate, diatomaceous earth and the like. is there. Its particle size is 5-10
The range of 0 μm is suitable, and is effective as a filler for improving the fire resistance of the noncombustible synthetic resin composite.

Glass powder is blended with the noncombustible synthetic resin composite material. In addition to glass powder, boric acid, borax or glass microballoons can also be used.
4 μm or more is preferred. Since these have a relatively low melting point, they have an effect of preventing the collapse of the noncombustible synthetic resin composite. The glass microballoons used here can be used even if most of them are broken during the molding process, because the purpose of use is different from the ceramic fine hollow particles intended for heat insulation and fire resistance. That is, since the glass microballoon is used as a glass powder, it is better to be broken during the molding process.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail, but the present invention is not limited to the embodiments unless it exceeds the gist.

Example 1 Compressive strength 700 kgf / c
m ² , bulk specific gravity 0.3-0.5 g / cm ³ , melting point 1600
Ceramic hollow particles 10 composed of only completely hollow particles having a thermal conductivity of 0.1 (kcal / mhr ° C.)
0 parts by weight, 200 parts by weight of silica fume as silica powder, 20 parts by weight of glass powder, and 5 parts by weight of glass microballoon were mixed with a phosphoric acid-based curing agent and mixed well. A resol-type phenol resin was added to the mixture so that the total amount became 6% by weight in terms of solids, and the mixture was sufficiently stirred, and laminated on top of the wood shown in FIG.
After press-molding at a pressure of / cm ^2, the mixture was cured at 60 ° C. for 30 minutes, cured, and used as a floor material of a wooden veranda.

Example 2 A non-combustible synthetic resin composite material composition having the same composition as in Example 1 was cast into a mold, and 80 kgf / cm ^2.
After being molded under pressure at 60 ° C. and cured at 60 ° C. for 45 minutes, the molded body was coated on wood shown in FIG. 2 and used as a handrail of a wooden veranda.

Table 1 shows the physical property test results of the incombustible synthetic resin composite materials produced in the examples. The thickness of the test specimen is 15m
m.

[0022]

The heating test was performed on a specimen 220 × 220 × 15.
(Mm) shows the back surface temperature when the front surface is heated at 850 ° C. for 10 minutes.

[0024]

As described above, the noncombustible synthetic resin composite material according to the present invention can be obtained by using ceramic fine hollow particles, silica powder and glass powder or / and glass microballoons as a phenol resin filler. The surface smoothness that could not be obtained with the phenolic resin foam was obtained. In addition, conventional phenol resin foams are only foams of the phenol resin itself, and therefore become open cells, are porous, have high water absorption, and have insufficient physical strength.

The surfaces of the ceramic fine hollow particles are point-joined by a phenol resin, and the voids between the ceramic fine hollow particles are filled with silica powder and glass powder or / and glass microballoons. Laminate non-combustible synthetic resin composites on wood with a smooth surface and low water absorption, which is completely different from the ones, dense and high in physical strength, excellent in heat insulation, and without fear of decay and insect damage. Coated composite synthetic wood could be obtained.

[Brief description of the drawings]

FIG. 1 is a composite synthetic wood of Example 1.

FIG. 2 is a composite synthetic wood of Example 2.

[Explanation of symbols]

 1. Wood 2. Non-combustible synthetic resin composite

Claims (1)

[Claims] 1. A ceramic fine hollow particle having a compressive strength of 600 kgf / cm ² or more, a bulk specific gravity of 0.3 to 0.5 g / cm ³ , and a melting point of 1500 ° C. or more, silica powder, glass powder or / and glass microballoon. A composite synthetic wood characterized by laminating or coating a non-combustible synthetic resin composite material obtained by adding a resol type phenol resin, a curing agent and water to the wood.